From 70e47f301d0dd936ce0d30241aa1427fbab02812 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Mon, 23 Feb 2026 19:50:11 -0600
Subject: [PATCH] [ethernet] Use C++17 nested namespace syntax (#14246)

---
 esphome/components/ethernet/ethernet_component.cpp | 6 ++----
 esphome/components/ethernet/ethernet_component.h   | 6 ++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/esphome/components/ethernet/ethernet_component.cpp b/esphome/components/ethernet/ethernet_component.cpp
index fcd32223e4..f855bc89cc 100644
--- a/esphome/components/ethernet/ethernet_component.cpp
+++ b/esphome/components/ethernet/ethernet_component.cpp
@@ -19,8 +19,7 @@
 #include <driver/spi_master.h>
 #endif
 
-namespace esphome {
-namespace ethernet {
+namespace esphome::ethernet {
 
 #if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 4, 2)
 // work around IDF compile issue on P4 https://github.com/espressif/esp-idf/pull/15637
@@ -881,7 +880,6 @@ void EthernetComponent::write_phy_register_(esp_eth_mac_t *mac, PHYRegister regi
 
 #endif
 
-}  // namespace ethernet
-}  // namespace esphome
+}  // namespace esphome::ethernet
 
 #endif  // USE_ESP32
diff --git a/esphome/components/ethernet/ethernet_component.h b/esphome/components/ethernet/ethernet_component.h
index b4859c308d..1cd44d2b2c 100644
--- a/esphome/components/ethernet/ethernet_component.h
+++ b/esphome/components/ethernet/ethernet_component.h
@@ -15,8 +15,7 @@
 #include "esp_mac.h"
 #include "esp_idf_version.h"
 
-namespace esphome {
-namespace ethernet {
+namespace esphome::ethernet {
 
 #ifdef USE_ETHERNET_IP_STATE_LISTENERS
 /** Listener interface for Ethernet IP state changes.
@@ -218,7 +217,6 @@ extern EthernetComponent *global_eth_component;
 extern "C" esp_eth_phy_t *esp_eth_phy_new_jl1101(const eth_phy_config_t *config);
 #endif
 
-}  // namespace ethernet
-}  // namespace esphome
+}  // namespace esphome::ethernet
 
 #endif  // USE_ESP32